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Q: Quantenoptik und Photonik

Q 38: Poster Fallen und Kühlung

Q 38.2: Poster

Donnerstag, 25. März 2004, 14:00–16:00, Schellingstr. 3

Photoassociation in a two species mixture — •J. Lange¹, S. Kraft¹, M. Mudrich¹, G. Telles², R. Wester¹, and M. Weidemüller¹ — ¹Physikalisches Institut, Universität Freiburg, 79104 Freiburg — ²University of Sao Paulo, Sao Carlos, Brazil

We report on our current developments towards the detection of ultracold polar LiCs molecules to be produced via photoassociation out of a mixture of ultracold ⁷Li and ¹³³Cs atoms. In a first step, photoassociation spectroscopy has been performed on Cs₂ in a quasi-electrostatic dipole trap (QUEST) formed by a focussed 100 W CO₂-laser beam. Detailed investigations of saturation effects are discussed.

In addititon, we study cooling processes, in particular Raman sideband cooling [1], in the QUEST in a new experimental setup. The aim is to create a Bose-Einstein condensate [2] as a cooling agent to sympathetically cool the lithium into quantum degeneracy.

[1] A. J. Kerman et al., Phys. Rev. Lett. 84, 439 (2000)

[2] M. D. Barrett et al., Phys. Rev. Lett. 87, 010404 (2001), G. Cennini et al., Phys.Rev. Lett. 91, 240408 (2003)